So it's not enough that his ability isn't 'on-call' so to speak? He doesn't have access to the catalyst or its ingredients, and he wouldn't use them if he did. Pain hurts.

If we need a greater method of control, I believe one may be formulated with relative ease. Perhaps a reversing catalyst handy for the administration? I'm also told this academy is located on an island; it takes some serious grub to get a secondary shift out of a Dozard and I highly doubt he'll find any cattle farms around. If I had to guess, standard size Dozards will be all you'll get out of him in this RP. I'm not against a little pre-scripting if it will make him a better fit (IE, an agreement to have no secondary shifts).

Maybe an allergy to lemon juice? It did take a few million zerg genetic strands to get the two biological systems to co-exist peacefully.

Otherwise, I'm open to some suggestions.